<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header :addTodo="addTodo" />
      <List :todoList="todoList" :asignChangeHandle="asignChangeHandle" :asignDeleteHandle="asignDeleteHandle"/>
      <Footer :todoList="todoList" :allChangeHandle="allChangeHandle" :deleteSuccess="deleteSuccess"/>
    </div>
  </div>
</template>

<script>
import Header from "./components/Header";
import List from "./components/List";
import Footer from "./components/Footer";
export default {
  name: "App",
  data() {
    return {
      todoList: [],
    };
  },
  methods: {
    //1.添加数据 (push)
    addTodo(newTodo) {
      this.todoList.unshift(newTodo);
    },

    //2.单个切换 非变更方法 重新给数据赋值
    asignChangeHandle(id){
      this.todoList = this.todoList.map((item) => {
        return item.id === id ? {...item , done: !item.done} : item
      })
    },

    //3.单个删除函数 过滤
    asignDeleteHandle(id){
      //给删除添加确定
      const isDelete = confirm("确定删除吗😢😢😢")
      if(!isDelete) return 
      
      this.todoList = this.todoList.filter((item) => {
        return item.id !== id
      })
    },

    //4.全选切换 传true 或 false 就把done全部改为true或false
    allChangeHandle(value){
      this.todoList = this.todoList.map((item) => {
        return {...item , done: value}
      })
    },

    //5.删除已完成
    deleteSuccess(){
      this.todoList = this.todoList.filter((item) => !item.done)
    }

  },

  //初始化去本地存储拿数据 拿不到就是空数组
  mounted(){
    this.todoList = JSON.parse(localStorage.getItem("todoList") || "[]")
  },

  //改变数据添加到本地存储
  watch:{
    todoList(){
      localStorage.setItem("todoList" , JSON.stringify(this.todoList))
    }
  },

  components: {
    Header,
    List,
    Footer,
  },
};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>